An odontogenic infection originating from a maxillary premolar is most likely to spread into which fascial space?

Given the root apex position of maxillary premolars relative to the buccinator muscle attachment, infections from these teeth most commonly spread into the buccal space. The lingual space is a mandibular anatomic space (not relevant to maxillary teeth), the canine space relates more specifically to maxillary canine/incisor infections, and pharyngeal space involvement is more typical of posterior mandibular or third molar infections.